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Chemical Engineering Mcqs

A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from ______________ ppm?

 (A)  1000 to 2000

 (B)  3000 to 6000

 (C)  6000 to 9000

 (D)  10000 to 100000

Submitted By :Ali Uppal

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